Gas-engine.



PATENTED AUG. 18, 1908. G. B. PETSGHE.

GAS ENGINE.

APPLICATION FILED DEC. 30, 1904.

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' PATENTED AUG. 18, 1908. G. B. PETSGHE. I

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G. B. PE-TSGHB.

GAS ENGINE. APPLICATION FILED D130. 30, 1904.

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WI TNESSES mmvron ATTORNEY.

7 PATENTED Luella, 1908. e. B. PETSOHE. GAS ENGINE.

APPLIUATION FILED DEC. 30, 1904.

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valve casings shove and st @ATENT ill hlfihl GUSTAV B. PEISCHE, OF EHELADELFEIA, lENNSYLVANlA, ASSIGNOR TO SOUFHWARK Y PENN SYLVAH in.

' RY Er MACHINE COMPANY, OF PHKLADELPIHA, PENNSYLYANLX. A CORPORA- figeir'icatien of Letters .Patent.

?atented Aug. 18, 1908.

Application filed Demonic? 30, 29%. Serial No. 238.917.

37263 ccnccm: .r elm l, GUSTAV B. ?E'rscris, Emperor of Germany, residhicn the following is e true and on, reierence being had to the which form a part his; invention relates to gas engines and has {or its object lo simplify and make more accessible the valves and velve sci-noting mechanism oi such engines.

1m orient features of my invention are the p sing "of the edmission' and exhaust one side 01 the cyiinden'th-s valves situated in ss'id casings having olieir stems emeniiingnpwsrd en coupled. so valve actuating mechanism situeteii shove the con-20in oi she cylinderi/ By the valve ecws sing-inechnnism is si'lusied oi the side oi ihe cylinder, so as to lie above the valve casings which extend from the side of 'r-he cylinder and at the side oi the velve casings which ezitend from the top of the cylinder.

Another and very important iesiure of rm; invention, consists in combining with the a. mission snd exlisust valves of the engine cylinder or cylinders, two sets of reciprocating or oscil sting cerns, each set of coins being actuated by one of lenl devices, set at 90 apart and rotating at one hel the speed of the main engine shaft,

the admission valves of the engine being 09- erstivcly connected with cenis of the dilleron'tsets and so that the admission and we hsust valves s13 esch end of the cylinder or cylinders are actuated by cums of the two diil'ereni sels.

Gther features of my invention will be best understood as described in connection with the drawings in which they are illustrated, reference heing now had to the drawings in which my invcniion is illustrated and in which I Figurei is 9. side elevation of a two cylinder, four cyclegn-s engine, provided with my iniiroveinenis, and shown as coupled to drives lilowing engine. .2, is a lsn view of the engine shown in Fig. 1. 3, is an enlerged elevation, of the cylind connected egsolicnc'es, as shown in Fig.1.

two QCCBHLTlCS, or equivsu l i l l.

Fig. i, is e cross-sectional view on the line 44, of Fig. Figs. 5, 6, 7, S, are diagram Ina-lie views illustrating the operation of the actuating cams u )on the admission and orghaust valves of tlic engined" Figs. 9, 10, 11 and 12, are also diagrammatic views illustrating the action of the 8211118 and the consecutive operation of the valves in my engine. Figs. 13, to 16, inclusive, are diagrams indicating the conditions existing in the cyl inders of the engine at dillcrent times, thoseviews being intendedt-o he considered in connest-ion with diagrams 9, to 12, inclusive, the shading shown in Fig. 13, indicating a. new charge being taken into the cylinder end; that shown in Fig. 14, showing the charge being compressed; that shown in Fig. 15, indicating the explosion or combustion of the charge, and thst'sliown in Fig. 16, indicating :7. charge being exhausted from the cylinder end. Fig. 17, is a. diagram intended to be read in connection with Figs. 9 to 12 inclusive. rigs. 18 to 20, indicate permissible modifications of the corn construction.

A, indicates the bed plate of the engine, A, the frame of the blowing engine, Ari-the frame of the gas engine, A the distmoe piece situated between the two-cylinders of the engine, A the crosshesd guide at the rear of the rear cylinder.

B, and B, indies-to the two gas engine cylinders, B, standards, arranged one at each end of each c ranged alongside of the standards B B, indicates C, (7 and ere the admission valve vlinder; B B brackets, sir- 1 the piston rod of the engine.

casings, placed on the top, and at each end of,

the engine cylinders.

D, D D and D arc the cxl'iuusb valve cesings, secured at the sides of the cylinders as shown. I

Slide guides E are securedon the brackets B, and formed, as shown, with two parallel guidcwuys E, and E.

E, E indicate upwardly ox tending hrs-ckets, secured on the uidewnys l3, and supporting pivot pins indicated at E", On these pivot pins are secured thc'l'wo sets of three armed mini actuated levers, those marked F,

ion

* Fflnnd I, being connected to actuate the ad niission vulvesnnd those marked G, G", Q end G, being connected to actuate the exer B, and its heiress valves.

H, H, etc, are slides moving in tligguidm,

' close the port, indicated at K F, F F etc. as shown.

and J being connected ways E, and E, with two sets of cams, those marked 1, l and I, being arranged to act on the leyers F, F etc, and through them to actuate the admission valves, and those marked J, J J V to act upon the lovers G", G'-, etc., and through them to actuate the exhaust valves. I

II, and [1 indicate two lines of parallel reciprocating rods connecting the slides II, in two sets. As shown, these rods are conveniently supplied with adjusting nuts, as indicated at 11 H see Fig. 3, indicating other adjusting and binding nuts by which the slides can be adjusted on the rods. The two lines of rods are coupled through the connecting rods H with the two reciprocating levers H, and Il and these in turn are coupled, through the rods H and H", with the two eccentrics H and H, which are set at 90 apart on the shaft H, which shaft is driven at one half the speed of the main shaft H, by trated, to wit: The shaft H", has secured to it the miter gear H ywhich is engaged and driven by the miter gear H, on the shaft H said shaft being actuated through the miter gears H, and H", by the shaft H The construction of the admission valve and valve casing which forms the subject matter of my ap lication, Serial Number 304,627, filed Marc 1 7, 1906, is best shown in Fig. 4. The casing K, is formed with an air admission chamber K, and gas admission chamber K and has fitted into it the seat portion K provided with seats as indicated at K, and K The portion K, of the casing is.situated on a separate portion K, which fits in the admission port of the engine, as shown, and is formed with a valve seat K, at its bottom.

K indicates the cover 7 through which extends the sleeved valve stem L, having secured to it the valve portions, one, indicated at L, adapted to seat itself on the seat K and the other, indicated at L being a cylinder valve adapted to Through the sleeve stem L, extends the valve rod M, sup' porting at its end, the valve M, which is adapted to seat itself on the seat The stem M, is secured to one end of the lever- N, pivoted on one of the standards B the opposite end of the lever being connected, through the angular heads N, with one of the valve actuating rods N which, in turn, is coupled to one of the series of valve actuating levers The angular. heads N, are adapted to enable the rods N to be coupled by pins H, as indicated in Fig. 4, so as to be actuated either by the inside or out side line of reciprocating cams.

N indicates a 'rooved segment secured on the inner arm of the lever N, as shown in Fig. 4. I

of the' casing and formed or connected the connections illus the cams I,

0, 0, etc, are lever arms coupled to the tops of the sleeve stems L,

and pivoted on shafts O, the squared ends of which move in slots B", of the standards B The levers O, are connected by links 0 with slides 0, moving in the slotted segment N and are connected. by links and lever arms 0 with a longitudinally running rod 0, supported in the standards B as shown, and coupled to be actuated by a governor, as indicated at O in any convenient way. I

The exhaust valve casings which form the subject matter of my application Serial Number 304,626, filed March 7, 1906, are made up of portions P, which, as shown in Fig. 4, have, circular openings P, and P at top and bottom, both larger than the largest diameter of the exhaust valve.

P, indicates a water cooled cylinder'fitting in the opening P, and P indicates a water cooled seat portion fitting in the opening P and extending below the seat in cylindrical form, passing through a stufling box P, into the exhaust conduit P indicates the water cooled exhaust valve havinga cylindrical portion Q, which fits in the cylinder P, and a valve portion Q adapted to seat itselfon the seat P, as shown. These valves are coupled, through rods R, which preferably extend up through the slide guides E, between the two slides H, H, as shown, and are coupled, through pins R, ex-

tending alternately inward and outward, with the cam actuated levers G, G G and G.

In Fig. 18, I have indicated a type of oscillating cam I, secured on a pivot E which can be used in place of the reciprocating cams I, J etc. In Fig. 19, I have indicated at I, a form of an ular reciprocating cam, which can be also su stituted for the cams I, J, etc, such cams being coupled to the rods for instance, through the sliding blocks N; E; indicating the slide guides for both have indicated another form of cam I, to be coupled with the rods N through a slide N and spring N, indicating the cam slide in this construction.

Referring now to the diagrammatic views. Those shown in Figs. 5 to 8 inclusive are easily followed, the tions of the cams, cam levers, admission and exhaust valves in connection with the motions of the eccentrics H and H, the positions being illustrated for each half turn of the Ihain shaft H and through two consecutive revolutions of that shaft. The diagrams, Figs. 9 to 12, inclusive, show, at the left hand side, the condition as to opening and closing of the engine valves, and at the right handside, the positions of the pistons in the cylinders, and the condition of the gas mixtures in the different ends of the cylinders, These diagrammatic views are to be read in connection with the diagrams and blocks N.. In Fig. 20, I

reciprocating views showing the opera- 5 it aFi 9 with .tence T seems Fig. i i 7, mid l re. 12 with Fig. 8. The diagrams show how the motion of the two eccentrics is distributed to move the valves pro erly on the four cycle principle. The triengies fully shaded in the series 9, to 12, indicate that those. pz irticulnr valves are Wide open; the triangles partly shaded indicate the positions in the motion diegrannneticully illustrated; in which the valves in question open, such valves being closed in the rliztgrornnietic illustration. The make up oi" the diagrmunmric Figs. 9 to ll, is based on diagram, Fig. 17, S, indicating the eccentric circle which, it will he remembered, describes one revolution while the main shalt of the engine is describing two revolutions; one quarter of the eccentric circle is therefore described during each stroke of the engine piston and e unis the time the valves are to he opened W iether they are inlet or outlet valves. T he shaded segment represents that port of the stroke of the coin utilized to hold the valve open and may obviously be either at the right or the left of the diagram. Thus, as shown, the quarter revolution from S, to S corresponds with the open shaded valve position T, T of the segment shown shove the eccentric circle and corresponding to the segment shown in diagrams 9 to 12.

'1, corresponds to the eccentric movement from S to S or from S to S, and the segment T T, corresponds with the socentrio movements from v 3 to S lt will readily be seen from the diagrammatic illustretions'how the operation of'tn'e valves of the tandem cylinders, and the four cycle operation of the engine, is carried into effect by my mechanism. Thus, in the position shown in Figs. 5 and 9, the admission valve of cylinder B, 'is open, all the other with valves working in said.

valves of that cylinder being closed, and the exhaust valve D, of cylinder B is driven, all the other valves of thetcylindcr being closed, consequently we have, as shown at the right oi Fig. 9, admission zit the left hand end of cylinder B, compression at the right hand end of cylinder B, explosion et'the left hand end of B, and exhaust at the right hand end of" saidcylinder. In diegrsnis Figs. 6 and 10, all the velves of cylinder B, are closed-while in cylinder B, theexheust valve D is open,

is also the admission valve C, consequently We heve admission at the right hand end oi cylinder B", exhaust at the left hand end of cylinder B, explosion at thoright hand end oi' cylinder B, and compression at the left hand cndof cylinder B. I lzn disg rzims Figs. 7 and 11, the exhaust valve D of cylinder B, is open and the admission valve of the cylinder B, is opened, all the other valves being closed, consequently We have admission at the left hand end oi c linder B, compression at the right hand e d of the some cylinder, explosion at the left l l l 1, l :l l

the valve casin s at the hand end of cylinder f5, mid exhaust sit the right hand end of cylinder 13. Again in dim grains 8 and 12, exhaust valve ll, and edinissionvolve C of cylinder B, are open all the valves of cylinder ll, are loscdfconsequently We have admission at ihc right hood end of cylinder B, exhaust at the left hand end of cylinder B, explosion st ihe right llfi-lltl end of cylinder B, and compression at the left hand end oi ll, the iour cycle action hcins thus provided for.

The general action of the eccentrics and connected devices in opening midi-lo the valves will he clearly understood from ivhut has been already explained.

It will he observed that in the engine disclosed each of the four cylinder ends forms a Working chamber having an inlet and an exhaust valve and that the rods ll. end ll? with the slides H form two valve actuating devices which move to and fro synchronously but ninety degrees out of phase with each other and with a frequency of to and fro movement or reciprocation, oneis i that of the. engine pistons.

Having now described my invention, what 1 claim as new and desire to secure l'iy Letters Patent is,

1. In a gas engino ss cylinder having sdmission and exhaust valve casings, said cesings being situated some above and some at one side of the cylinder, the cornhinstion casings and all having upwardly extending iiclualiiu rods, and valve actuating mechanism situated edjecent the portion of the cylinder between top of the cylinder and those at theside of the cylinder, said mechanism acting on the valves through their upwardly extending rdds.

. 2. In a gas engine, a cylinder having; edmission end exhaust valve casings, said cos ings being situated some at the top and some of the cylinder, in combination at one side with vertically movable valves, working in said casings, having valve rods cxtendingup' werdly therefrom, and v olve actuating mech' anism situated at the side of the cylinder between the valve casings at the top of the cylin'der end those at the side of the cylinder, said mechanism acting on the valves through these upwardly extending rods.

3. ln s four-cycle gas engine hoving 9. pinrallty of cylinder ends, in which LXplOSlOllS occur at different times end having synchronously reciprocating pistons, an inlet valve and an exhaust valve for each cylinder end, two sets of valve actuating devices, means for moving saiddevices to and fro in synchronism, out ninety degrees out of pliiise with each other, end with a frequency onehalf, that of the pistons, end connections whereby-each device ectuetes theedmission valves of one or more cylinders-lids end the exhaust valves of one ormorewylinderends,

. ing upwardly extending and the inlet valve tuated by one device and e same cylinder end other device.

4. In a gas engine having two cylinders of the four cycle type, the combination with the admission and exhaust valves thereof, of two sets of cams, two eccentrics, set at ninety degrees apart and rotating at one half the speed 0 the main engine shaft, connected to actuate said sets of cams, means operatively connecting the admission valves of each cylinder alternately with cams of the different sets, and means connecting the exhaust valves of each cylinder also with earns of the different the exhaust valve is actuated by the 5. In a gas engine having admission and exhaust valve casings situated some above one side of the cylinder or cylinders, and valves workingin said casings, having upwardly extending actuating rods, the combination therewith, of two sets of reciproeating cams, each set being independently actuated by a constantly moving part of the engine, and means operatively connecting the admission valve rods of each cylinder 'alternately with cams of the separate sets, and the exhaust valve rods, also alternately, with cams of the different sets, the admission and exhaust valve at each end of a cylinder being actuated by cams of the different sets.

6. In a as engine having admission and. exhaust vafive casings situated some above and some at one side of the cylinder or cylinders, and valves working in said casings havactuatingrods, the combination therewith of two sets of reciprocating cams, two eccentrics, set at a right angle to each other and rotating at one half the speed of the main shaft of the engine, connected to actuate said sets of cams, and. means operatively connecting the admission valve rods of each cylinder alternately with cams of the separate sets and the exhaust valve rods, also alternately, with cams of the different sets, the admission and exhaust valve at each end of a cylinder being actuated by cams of the different sets.

7. In a gas engine, the combination with the cylinder or cylinders and the admission f and exhaust valves thereof, of two sets of re ciprocating slides, moving in straight lines and set parallel to each other, means for actuating said sets of slides in relation to each other as described, cams for each admission and exhaust valve;supported on and moving with the slides, and means operatively connecting the valves and cams in such order that the admission. and exhaust valves of each end of a cylinder are actuated by cams of different sets, and that the valves of the same kind at opposite ends of the cylinders of each cylinder end is ac are also actuated by cams of the different sets.

8. In agas engine having admission and exhaust valve casings situated some above and some at ders and valves working in said casings having upwardly extending actuating rods, the combination therewith, of slide guides set at the sides of the cylinders, two sets of reciprocating slides actuated by constantly moving parts of the engine,:cams for each admission and exhaust valve, moving with said slides, and means operatively connecting the admission and exhaust valves alternately with cams of the different sets.

9. In a gas engine having admission valves one side of the cylinder or cylin- T valves set at the sides thereof, the combination therewith, of two sets of reciprocating cams supported on the cylinders between the admission and exhaust valves and actuated by constantly moving parts of the engine as described, mechanism, including walking beam levers N, N, &c., .con'necting the admiss sion valves alternately to cams of thediiferent sets, upwardly extending valve rods connected to the exhaust valves, and means connecting said valve rods alternately to cams of the different sets, 10. In a gas engine having admission valves set in the tops of its cylinders and exhaust valves set at the sides thereof, the combination therewith, of two sets of reciprocating cams supported on the cylinders im1nediately above the exhaust valves and. actuated as described, mechanism, walking beam levers N, N, &c., connecting the admission valves alternately to cams of the difi'erent sets, upright valve rods extending from the exhaust valves between the two sets of cams, and means operatively connecting said rods alternately with cams of the difierent sets.

11. In a four-cycle gas engine having two double-acting cylinders arranged in tandem with synchronously reciprocating pistons and with an admission and exhaust valve at each endof each cylinder, the combination of two straight line reciprocating valve actuating devices, means for reciprocating said devices in synchron smfbut ninety degrees out of phase with each other and with a frequency including,

one-half that of the pistons, and connections whereby each of said devices aetuates the admission valves in two cylinder ends and the exhaust valves in the other cylinder ends, H and the inlet valve at one cylinderendis 

